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Desulfurization, denitrification, dust removal and waste heat recovery integrated comprehensive technology for waste gas in furnace

A technology of waste gas desulfurization and waste heat recovery, applied in the chemical industry, climate sustainability, chemical instruments and methods, etc., can solve complex problems, achieve ultra-low emissions, strong economy and practicability

Pending Publication Date: 2019-04-12
SHANDONG JINGYAO GLASS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the complex raw materials for glass production, the high content of alkali metals, fluorides, sulfur trioxide, nitrogen dioxide, and various salts in the flue gas has brought many technical difficulties to the flue gas treatment.

Method used

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  • Desulfurization, denitrification, dust removal and waste heat recovery integrated comprehensive technology for waste gas in furnace
  • Desulfurization, denitrification, dust removal and waste heat recovery integrated comprehensive technology for waste gas in furnace

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Embodiment Construction

[0020] Kiln exhaust gas desulfurization, denitrification, dust removal and waste heat recovery integrated comprehensive technology, the process flow is as follows;

[0021] Step 1: Pre-dust removal and desulfurization: the exhaust gas from the kiln flue enters the dust collector and puts quicklime CaO into the dust collector; a large amount of smoke and dust will be generated during the operation of the glass kiln, and the sodium ions in the glass kiln are likely to react with the components of the catalyst at high temperature and cause poisoning Phenomenon, if the dust removal treatment is not carried out, or the dust removal effect is not good, it will cause smoke and dust to accumulate on the surface of the catalyst, reducing the denitrification efficiency. Agent NH 3 , will directly interact with SO in the flue gas 2 , SO 3 The reaction produces NH 4 HSO 4 , with wet viscosity, attached to the surface of the catalyst, blocking the honeycomb pores, the main reaction:

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Abstract

The invention discloses a desulfurization, denitrification, dust removal and waste heat recovery integrated comprehensive technology for waste gas in a furnace. The technology includes the following processes of furnace flue gas, pre-dust removal and pre-desulfurization, in-SCR high-temperature denitrification, dry method desulfurization, a cloth bag dust collector, an induced draft fan and up-to-standard discharge. The technology has the advantages that the domestic glass industry is transformed and upgraded, old and new kinetic energy conversion of the traditional industry is pushed, green manufacturing and high-quality development of enterprises are realized, and certain application and popularization value is realized; super-low discharge is realized, and economy and practicability arehigh.

Description

technical field [0001] The invention belongs to the technical field of kiln waste gas treatment, and in particular relates to a comprehensive technology for integrated waste heat recovery of kiln waste gas desulfurization, denitrification and dust removal. Background technique [0002] At present, domestic glass production mainly uses petroleum coke, heavy oil, producer gas, natural gas, etc. as fuels. According to the production scale and fuel conditions, the exhaust gas temperature of building material glass production is mostly 400-500 °C, and the exhaust gas temperature of daily glass production is Mostly at 260-380°C; the main pollutant in the flue gas is SO 2 , HF, NOx and dust, while containing some heavy metals, of which NOx, SO 2 , HF is the main pollutant, SO 2 The emission concentration is 1000mg / Nm 3 Around, NOx emission concentration is 2000-3000mg / Nm 3 Left and right, compared with coal-fired power plant boilers, glass kiln dust is more complex and composed...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/56B01D53/50B01D53/83B01D46/02
CPCB01D46/023B01D53/50B01D53/83B01D53/8625Y02P20/10
Inventor 唐永薄文才张守录于国明付震
Owner SHANDONG JINGYAO GLASS GRP
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